1 /* SCTP kernel implementation 2 * Copyright (c) 2003 International Business Machines, Corp. 3 * 4 * This file is part of the SCTP kernel implementation 5 * 6 * This SCTP implementation is free software; 7 * you can redistribute it and/or modify it under the terms of 8 * the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This SCTP implementation is distributed in the hope that it 13 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 14 * ************************ 15 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16 * See the GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with GNU CC; see the file COPYING. If not, write to 20 * the Free Software Foundation, 59 Temple Place - Suite 330, 21 * Boston, MA 02111-1307, USA. 22 * 23 * Please send any bug reports or fixes you make to the 24 * email address(es): 25 * lksctp developers <linux-sctp@vger.kernel.org> 26 * 27 * Written or modified by: 28 * Sridhar Samudrala <sri@us.ibm.com> 29 */ 30 31 #include <linux/types.h> 32 #include <linux/seq_file.h> 33 #include <linux/init.h> 34 #include <linux/export.h> 35 #include <net/sctp/sctp.h> 36 #include <net/ip.h> /* for snmp_fold_field */ 37 38 static const struct snmp_mib sctp_snmp_list[] = { 39 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB), 40 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS), 41 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS), 42 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS), 43 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS), 44 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES), 45 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS), 46 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS), 47 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS), 48 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS), 49 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS), 50 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS), 51 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS), 52 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS), 53 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS), 54 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS), 55 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS), 56 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS), 57 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS), 58 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS), 59 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS), 60 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS), 61 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS), 62 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS), 63 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS), 64 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS), 65 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS), 66 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS), 67 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ), 68 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG), 69 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS), 70 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS), 71 SNMP_MIB_SENTINEL 72 }; 73 74 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ 75 static int sctp_snmp_seq_show(struct seq_file *seq, void *v) 76 { 77 struct net *net = seq->private; 78 int i; 79 80 for (i = 0; sctp_snmp_list[i].name != NULL; i++) 81 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 82 snmp_fold_field((void __percpu **)net->sctp.sctp_statistics, 83 sctp_snmp_list[i].entry)); 84 85 return 0; 86 } 87 88 /* Initialize the seq file operations for 'snmp' object. */ 89 static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 90 { 91 return single_open_net(inode, file, sctp_snmp_seq_show); 92 } 93 94 static const struct file_operations sctp_snmp_seq_fops = { 95 .owner = THIS_MODULE, 96 .open = sctp_snmp_seq_open, 97 .read = seq_read, 98 .llseek = seq_lseek, 99 .release = single_release_net, 100 }; 101 102 /* Set up the proc fs entry for 'snmp' object. */ 103 int __net_init sctp_snmp_proc_init(struct net *net) 104 { 105 struct proc_dir_entry *p; 106 107 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, 108 &sctp_snmp_seq_fops); 109 if (!p) 110 return -ENOMEM; 111 112 return 0; 113 } 114 115 /* Cleanup the proc fs entry for 'snmp' object. */ 116 void sctp_snmp_proc_exit(struct net *net) 117 { 118 remove_proc_entry("snmp", net->sctp.proc_net_sctp); 119 } 120 121 /* Dump local addresses of an association/endpoint. */ 122 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 123 { 124 struct sctp_association *asoc; 125 struct sctp_sockaddr_entry *laddr; 126 struct sctp_transport *peer; 127 union sctp_addr *addr, *primary = NULL; 128 struct sctp_af *af; 129 130 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 131 asoc = sctp_assoc(epb); 132 133 peer = asoc->peer.primary_path; 134 if (unlikely(peer == NULL)) { 135 WARN(1, "Association %p with NULL primary path!\n", asoc); 136 return; 137 } 138 139 primary = &peer->saddr; 140 } 141 142 rcu_read_lock(); 143 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { 144 if (!laddr->valid) 145 continue; 146 147 addr = &laddr->a; 148 af = sctp_get_af_specific(addr->sa.sa_family); 149 if (primary && af->cmp_addr(addr, primary)) { 150 seq_printf(seq, "*"); 151 } 152 af->seq_dump_addr(seq, addr); 153 } 154 rcu_read_unlock(); 155 } 156 157 /* Dump remote addresses of an association. */ 158 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 159 { 160 struct sctp_transport *transport; 161 union sctp_addr *addr, *primary; 162 struct sctp_af *af; 163 164 primary = &assoc->peer.primary_addr; 165 rcu_read_lock(); 166 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, 167 transports) { 168 addr = &transport->ipaddr; 169 if (transport->dead) 170 continue; 171 172 af = sctp_get_af_specific(addr->sa.sa_family); 173 if (af->cmp_addr(addr, primary)) { 174 seq_printf(seq, "*"); 175 } 176 af->seq_dump_addr(seq, addr); 177 } 178 rcu_read_unlock(); 179 } 180 181 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 182 { 183 if (*pos >= sctp_ep_hashsize) 184 return NULL; 185 186 if (*pos < 0) 187 *pos = 0; 188 189 if (*pos == 0) 190 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 191 192 return (void *)pos; 193 } 194 195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 196 { 197 } 198 199 200 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 201 { 202 if (++*pos >= sctp_ep_hashsize) 203 return NULL; 204 205 return pos; 206 } 207 208 209 /* Display sctp endpoints (/proc/net/sctp/eps). */ 210 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 211 { 212 struct sctp_hashbucket *head; 213 struct sctp_ep_common *epb; 214 struct sctp_endpoint *ep; 215 struct sock *sk; 216 int hash = *(loff_t *)v; 217 218 if (hash >= sctp_ep_hashsize) 219 return -ENOMEM; 220 221 head = &sctp_ep_hashtable[hash]; 222 sctp_local_bh_disable(); 223 read_lock(&head->lock); 224 sctp_for_each_hentry(epb, &head->chain) { 225 ep = sctp_ep(epb); 226 sk = epb->sk; 227 if (!net_eq(sock_net(sk), seq_file_net(seq))) 228 continue; 229 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk, 230 sctp_sk(sk)->type, sk->sk_state, hash, 231 epb->bind_addr.port, 232 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 233 sock_i_ino(sk)); 234 235 sctp_seq_dump_local_addrs(seq, epb); 236 seq_printf(seq, "\n"); 237 } 238 read_unlock(&head->lock); 239 sctp_local_bh_enable(); 240 241 return 0; 242 } 243 244 static const struct seq_operations sctp_eps_ops = { 245 .start = sctp_eps_seq_start, 246 .next = sctp_eps_seq_next, 247 .stop = sctp_eps_seq_stop, 248 .show = sctp_eps_seq_show, 249 }; 250 251 252 /* Initialize the seq file operations for 'eps' object. */ 253 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 254 { 255 return seq_open_net(inode, file, &sctp_eps_ops, 256 sizeof(struct seq_net_private)); 257 } 258 259 static const struct file_operations sctp_eps_seq_fops = { 260 .open = sctp_eps_seq_open, 261 .read = seq_read, 262 .llseek = seq_lseek, 263 .release = seq_release_net, 264 }; 265 266 /* Set up the proc fs entry for 'eps' object. */ 267 int __net_init sctp_eps_proc_init(struct net *net) 268 { 269 struct proc_dir_entry *p; 270 271 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, 272 &sctp_eps_seq_fops); 273 if (!p) 274 return -ENOMEM; 275 276 return 0; 277 } 278 279 /* Cleanup the proc fs entry for 'eps' object. */ 280 void sctp_eps_proc_exit(struct net *net) 281 { 282 remove_proc_entry("eps", net->sctp.proc_net_sctp); 283 } 284 285 286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 287 { 288 if (*pos >= sctp_assoc_hashsize) 289 return NULL; 290 291 if (*pos < 0) 292 *pos = 0; 293 294 if (*pos == 0) 295 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 296 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 297 "RPORT LADDRS <-> RADDRS " 298 "HBINT INS OUTS MAXRT T1X T2X RTXC " 299 "wmema wmemq sndbuf rcvbuf\n"); 300 301 return (void *)pos; 302 } 303 304 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 305 { 306 } 307 308 309 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 310 { 311 if (++*pos >= sctp_assoc_hashsize) 312 return NULL; 313 314 return pos; 315 } 316 317 /* Display sctp associations (/proc/net/sctp/assocs). */ 318 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 319 { 320 struct sctp_hashbucket *head; 321 struct sctp_ep_common *epb; 322 struct sctp_association *assoc; 323 struct sock *sk; 324 int hash = *(loff_t *)v; 325 326 if (hash >= sctp_assoc_hashsize) 327 return -ENOMEM; 328 329 head = &sctp_assoc_hashtable[hash]; 330 sctp_local_bh_disable(); 331 read_lock(&head->lock); 332 sctp_for_each_hentry(epb, &head->chain) { 333 assoc = sctp_assoc(epb); 334 sk = epb->sk; 335 if (!net_eq(sock_net(sk), seq_file_net(seq))) 336 continue; 337 seq_printf(seq, 338 "%8pK %8pK %-3d %-3d %-2d %-4d " 339 "%4d %8d %8d %7u %5lu %-5d %5d ", 340 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 341 assoc->state, hash, 342 assoc->assoc_id, 343 assoc->sndbuf_used, 344 atomic_read(&assoc->rmem_alloc), 345 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 346 sock_i_ino(sk), 347 epb->bind_addr.port, 348 assoc->peer.port); 349 seq_printf(seq, " "); 350 sctp_seq_dump_local_addrs(seq, epb); 351 seq_printf(seq, "<-> "); 352 sctp_seq_dump_remote_addrs(seq, assoc); 353 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d " 354 "%8d %8d %8d %8d", 355 assoc->hbinterval, assoc->c.sinit_max_instreams, 356 assoc->c.sinit_num_ostreams, assoc->max_retrans, 357 assoc->init_retries, assoc->shutdown_retries, 358 assoc->rtx_data_chunks, 359 atomic_read(&sk->sk_wmem_alloc), 360 sk->sk_wmem_queued, 361 sk->sk_sndbuf, 362 sk->sk_rcvbuf); 363 seq_printf(seq, "\n"); 364 } 365 read_unlock(&head->lock); 366 sctp_local_bh_enable(); 367 368 return 0; 369 } 370 371 static const struct seq_operations sctp_assoc_ops = { 372 .start = sctp_assocs_seq_start, 373 .next = sctp_assocs_seq_next, 374 .stop = sctp_assocs_seq_stop, 375 .show = sctp_assocs_seq_show, 376 }; 377 378 /* Initialize the seq file operations for 'assocs' object. */ 379 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 380 { 381 return seq_open_net(inode, file, &sctp_assoc_ops, 382 sizeof(struct seq_net_private)); 383 } 384 385 static const struct file_operations sctp_assocs_seq_fops = { 386 .open = sctp_assocs_seq_open, 387 .read = seq_read, 388 .llseek = seq_lseek, 389 .release = seq_release_net, 390 }; 391 392 /* Set up the proc fs entry for 'assocs' object. */ 393 int __net_init sctp_assocs_proc_init(struct net *net) 394 { 395 struct proc_dir_entry *p; 396 397 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 398 &sctp_assocs_seq_fops); 399 if (!p) 400 return -ENOMEM; 401 402 return 0; 403 } 404 405 /* Cleanup the proc fs entry for 'assocs' object. */ 406 void sctp_assocs_proc_exit(struct net *net) 407 { 408 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 409 } 410 411 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 412 { 413 if (*pos >= sctp_assoc_hashsize) 414 return NULL; 415 416 if (*pos < 0) 417 *pos = 0; 418 419 if (*pos == 0) 420 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 421 "REM_ADDR_RTX START\n"); 422 423 return (void *)pos; 424 } 425 426 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 427 { 428 if (++*pos >= sctp_assoc_hashsize) 429 return NULL; 430 431 return pos; 432 } 433 434 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 435 { 436 } 437 438 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 439 { 440 struct sctp_hashbucket *head; 441 struct sctp_ep_common *epb; 442 struct sctp_association *assoc; 443 struct sctp_transport *tsp; 444 int hash = *(loff_t *)v; 445 446 if (hash >= sctp_assoc_hashsize) 447 return -ENOMEM; 448 449 head = &sctp_assoc_hashtable[hash]; 450 sctp_local_bh_disable(); 451 read_lock(&head->lock); 452 rcu_read_lock(); 453 sctp_for_each_hentry(epb, &head->chain) { 454 if (!net_eq(sock_net(epb->sk), seq_file_net(seq))) 455 continue; 456 assoc = sctp_assoc(epb); 457 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, 458 transports) { 459 if (tsp->dead) 460 continue; 461 462 /* 463 * The remote address (ADDR) 464 */ 465 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 466 seq_printf(seq, " "); 467 468 /* 469 * The association ID (ASSOC_ID) 470 */ 471 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 472 473 /* 474 * If the Heartbeat is active (HB_ACT) 475 * Note: 1 = Active, 0 = Inactive 476 */ 477 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 478 479 /* 480 * Retransmit time out (RTO) 481 */ 482 seq_printf(seq, "%lu ", tsp->rto); 483 484 /* 485 * Maximum path retransmit count (PATH_MAX_RTX) 486 */ 487 seq_printf(seq, "%d ", tsp->pathmaxrxt); 488 489 /* 490 * remote address retransmit count (REM_ADDR_RTX) 491 * Note: We don't have a way to tally this at the moment 492 * so lets just leave it as zero for the moment 493 */ 494 seq_printf(seq, "0 "); 495 496 /* 497 * remote address start time (START). This is also not 498 * currently implemented, but we can record it with a 499 * jiffies marker in a subsequent patch 500 */ 501 seq_printf(seq, "0"); 502 503 seq_printf(seq, "\n"); 504 } 505 } 506 507 rcu_read_unlock(); 508 read_unlock(&head->lock); 509 sctp_local_bh_enable(); 510 511 return 0; 512 513 } 514 515 static const struct seq_operations sctp_remaddr_ops = { 516 .start = sctp_remaddr_seq_start, 517 .next = sctp_remaddr_seq_next, 518 .stop = sctp_remaddr_seq_stop, 519 .show = sctp_remaddr_seq_show, 520 }; 521 522 /* Cleanup the proc fs entry for 'remaddr' object. */ 523 void sctp_remaddr_proc_exit(struct net *net) 524 { 525 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 526 } 527 528 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 529 { 530 return seq_open_net(inode, file, &sctp_remaddr_ops, 531 sizeof(struct seq_net_private)); 532 } 533 534 static const struct file_operations sctp_remaddr_seq_fops = { 535 .open = sctp_remaddr_seq_open, 536 .read = seq_read, 537 .llseek = seq_lseek, 538 .release = seq_release_net, 539 }; 540 541 int __net_init sctp_remaddr_proc_init(struct net *net) 542 { 543 struct proc_dir_entry *p; 544 545 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 546 &sctp_remaddr_seq_fops); 547 if (!p) 548 return -ENOMEM; 549 return 0; 550 } 551